_FILE__,__LINE__,FUNCTION__实现代码跟踪调试（linux下c语言编程)

先看下简单的初始代码：注意其编译运行后的结果。

root@xuanfei-desktop:~/cpropram/2# cat global.h //头文件

#ifndef CLOBAL_H

#define GLOBAL_H

#include <stdio.h>

int funca(void);

int funcb(void);

#endif

root@xuanfei-desktop:~/cpropram/2# cat funca.c //函数a

#include "global.h"

int funca(void)

{

printf ("this is function\n");

return 0;

}

root@xuanfei-desktop:~/cpropram/2# cat funcb.c //函数b

#include "global.h"

int funcb(void)

{

printf ("this is function\n");

return 0;

}

root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c //联合编译

root@xuanfei-desktop:~/cpropram/2# ./a.out //运行

this is main

this is function

this is main

this is function

this is main

相同结果很难让人看出那里出错，下面我们用用 __FILE__,__LINE__,__FUNCTION__加入代码，看看有什么区别吗.

把 __FILE__,__LINE__,__FUNCTION__加入到mail.c中

root@xuanfei-desktop:~/cpropram/2# cat main.c

#include "global.h"

int main(int argc, char **argv)

{

printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);

funca();

printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);

funcb();

printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);

return 0;

}

root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c

root@xuanfei-desktop:~/cpropram/2# ./a.out

main.c(4)-main: this is main

this is function

main.c(6)-main: this is main

this is function

main.c(8)-main: this is main

上面的结果main.c(4)-main:this is main 表示在mian.c源代码的第四行main函数里边打印出来的 this is main

那样的话就很方便的让程序员对自己的程序进行排错！

为了更方便的使用它我们可以通过在global.h代码中进行宏定义

root@xuanfei-desktop:~/cpropram/2# cat global.h

#ifndef CLOBAL_H

#define GLOBAL_H

#include <stdio.h>

int funca(void);

int funcb(void);

#define DEBUGFMT "%s(%d)-%s"

#define DEBUGARGS __FILE__,__LINE__,__FUNCTION__

#endif

root@xuanfei-desktop:~/cpropram/2# cat funca.c

#include "global.h"

int funca(void)

{

printf (DEBUGFMT " this is function\n",DEBUGARGS);

return 0;

}

root@xuanfei-desktop:~/cpropram/2# cat funcb.c

#include "global.h"

int funcb(void)

{

printf (DEBUGFMT " this is function\n",DEBUGARGS);

return 0;

}

root@xuanfei-desktop:~/cpropram/2# cat main.c

#include "global.h"

int main(int argc, char **argv)

{

printf(DEBUGFMT "this is main\n", DEBUGARGS);

funca();

printf(DEBUGFMT "this is main\n", DEBUGARGS);

funcb();

printf(DEBUGFMT "this is main\n", DEBUGARGS);

return 0;

}

root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c

root@xuanfei-desktop:~/cpropram/2# ./a.out

main.c(4)-mainthis is main

funca.c(4)-funca this is function

main.c(6)-mainthis is main

funcb.c(4)-funcb this is function

main.c(8)-mainthis is main

root@xuanfei-desktop:~/cpropram/2#

这就是通过定义__FILE__,__LINE__,FUNCTION__的宏来简单实现代码的跟踪调试